Steps to reproduce bug or what you were doing when the bug occurred:

1) build a complex machine with floating parts
2) turn timescale down to 0
3) hit space to start (it's different when you click play)
4) the simulation runs for a bit before pausing. This is a problem when your contraption needs you to press "o" quickly to stop it from exploding.
See video: youtu.be/VtDfkMVVPiI?t=40s

If you start the run with the play button instead of the space bar it seems to pause OK. But a similar loss of control seems to exist in the instant after you turn the speed up.

Keep up the good work,
Tim.


Operating System: Windows 7 Ultimate 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.150113-1808)
Game Version: 0.03
output_log.txt: https://gist.github.com/anonymous/695af334797c76fe3294
System Specs:

------------------
System Information
------------------
Time of this report: 2/16/2015, 11:41:14
Machine name: ORION
Operating System: Windows 7 Ultimate 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.150113-1808)
Language: English (Regional Setting: English)
System Manufacturer: ASUS
System Model: All Series
BIOS: BIOS Date: 01/06/14 15:21:49 Ver: 08.05
Processor: Intel(R) Core(TM) i3-4160 CPU @ 3.60GHz (4 CPUs), ~3.6GHz
Memory: 8192MB RAM
Available OS Memory: 8098MB RAM
Page File: 1939MB used, 14255MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 32bit Unicode

---------------
Display Devices
---------------
Card name: NVIDIA GeForce GTX 750
Manufacturer: NVIDIA
Chip type: GeForce GTX 750
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_1381&SUBSYS_36421458&REV_A2
Display Memory: 4022 MB
Dedicated Memory: 1974 MB
Shared Memory: 2048 MB
Current Mode: 1680 x 1050 (32 bit) (59Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: SyncMaster
Monitor Id: SAM021E
Native Mode: 1680 x 1050(p) (59.954Hz)
Output Type: HDMI
Driver Name: nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um
Driver File Version: 9.18.0013.4752 (English)
Driver Version: 9.18.13.4752
DDI Version: 11
Driver Model: WDDM 1.1
Driver Attributes: Final Retail
Driver Date/Size: 2/6/2015 07:01:44, 17253848 bytes
WHQL Logo'd: n/a
WHQL Date Stamp: n/a
Device Identifier: {D7B71E3E-50C1-11CF-7865-4F161FC2C435}
Vendor ID: 0x10DE
Device ID: 0x1381
SubSys ID: 0x36421458
Revision ID: 0x00A2
Driver Strong Name: oem18.inf:NVIDIA_SetA_Devices.NTamd64.6.1:Section139:9.18.13.4752:pci\ven_10de&dev_1381
Rank Of Driver: 00E02001
Video Accel: